Vibrator



y -931. G. B. PICKOP 1,304,949.

VIBRATOR Filed April 4. 1929 Patented May 12, 1931 UNITED STATESPATENT}. O

GEORGE B. rroxor, on NEW HAVEN, CONNECTICUT, AssIe-NoR To MALIQEABLEIRON I FITTINGS COMPANY, or nnnnronn, CONNECTICUT a 1 vnmarronApplication fi1ed lApri1 4, 1929, Serial No. 352,549. i

My invention relates to a vibrator, and

'more especially to a vibrator suitable for use in removing castingsfrom boxes or flasks, and for similar purposes.

It issometimes difficult in foundry operations to remove castings fromthe boxes or flasks in which they are made and very often it occurs thatsand, dirt or othermatter ads heres to the walls of the boxes orflasks,and must be removed usually by pounding or scraping operations As theboxes or flasks are quite often damaged in this manner, and.

it is more orless of a tedious operation,-it has been found to be moreexpedient to use vibrators operated by compressedair or the'like in sucham'anner that the vibrators are caused to act upon thefla'skor boxandshake out or dislodge the material therefrom.

In such operations, it is, of cou'rse, necessary to attach the vibratorto theflask and to remove-ittherefromas soon as the operation iscompleted, so that the vibrator may be success'ively used upon a numberof flasks. At

thereto. Preferably, the jaw member forms Lone of the vibrator headsbetween which the transmitted to the attaching head largely the sametime, the connection between the vibrator and flask should be such thatthe vibrations 'will be transmitted to the walls of the flaskwithoutser'ious loss of energy or power ther'ebetween, that is, theconnectionshould be such that while the vibrator may befleasily andreadily attached to and removed from'the flask, the latter will beproperly acted on by the vibrator so that the castings, sand, or othermatter will be shaken out quickly- According to the vibrator'of whichmay be readily attached to or detached from a flask or the like, and atthe same time will bear firmly against the flask so that the vibrationswill be properly transmitted vibrator casing is clamped by a number ofbolts which pass through the heads andare held rigidly in place by nutsmounted on the.

ends of the bolts which are threaded.

Mounted within the casing is a vibratory ram, the blows 0r vibrations ofwhich are through bolts; Experience has shown that secured place by anyof the known methods, the metal of the securing means will after aperiod ofuse' become crystallized or means, although -theeffect of eachdistinct stroke will not be appreciable.

Generally speaking, it is an object of the invention to provide in avibrator or thelike,

an arrangement for securing" the heads thereon which may be readilyreplaced upon any fracture or other failure thereof, due to-fatigue orcrystallization of the material of the securing means. c V i a In a morespecific aspect, the invention re-' lates to a vibrator providedwith'heads which are secured to thevvibrator body and to one another bybolts, and one of the objectsof the invention is to provide in avibrator of this type an arrangement wherein one or more of the boltsmay be readily replaced when broken without the necessity of removingthe nuts therefrom.

Another object of the invention is to providein a vibrator having theabove improvements an arrangement for holding the bolts rigidly in placeduring the normal operation of the vibrator.

i where the heads are bolted to the cylinder, or I .To these and otherends, the inventionjconsists in the novel features and combinations ofparts to: be hereinafter described and claimed. A

In the drawings,

Fig. 1 is a side elevational view of a vibrator embodying myimprovementsitherein;

Fig. 2 is a sectio'nalview along line 2'2"of we Fig. 3 is a sectionalview along line 33 of Fig- 2;

mg. 4 is a View frem' the "right hand end of the vibrator shown inFig.1; and

. Fig. 5 is a sectional view. along line 55 of Fig. 4. v I vReferring'to the'dr'awings in which I have illustrated myinvention byshowing" a preferred embodiment" of the same, the reference numberlOindicates, in general, a vibrator or pot rapper comprising a cylinder orbody portion 11, provided with an eye 12, by means of which the vibratormay be supported by a crane hook or the like for handling.

Within the cylinder 11 is mounted reciprocable piston 13 of any approvedform. At the ends'of the cylinder are provided heads 14 and 15 which aresomewhat larger than the cylinder in order to receive bolts by means ofwhich the heads are secured in place, as will be more fullydescribedhereinafter. Heads 14 and 15 are provided with anvil surfaces 16 and 17,which enter the cylinder to a small extent and which directly re ceivethe blows from the piston 18.

The jaw member 18 is formed integrally v with the head 14 and consistsof a member of substantially C-shaped form having a. jaw or openingcorresponding in shape to receive the wall 19 of a flask or the like,wall 19 in the present instance being of channeled cross-sectional form.The jaw 18 comprises an upper substantiallyhorizontal portion 20, afront vertically extending side .21, a rear wall 22, and a lowerforwardly projecting portion 28. When in position upon the wall of aflask or the like, the upper port-ion 20 will be. substantiallyhorizontally disposed and will be of suflicient length to accommodatethe upper edge of the flask, upper substantially horizontal portion 20being of a length equal to or greater thanany flange commonly used upona flask wall. Likewise in order that the vibrator may be readily placedupon such a flanged flask, it is de- 1 sirable thatthe distance betweenthe extreme end 24 of the lower C-shaped part of the jaw and the end 25of the front wall 21 be at least equal to the length of the upper wall20. When these dimensions are followed, any flange will readily bereceived in the jaw opening which is not too long to be accommodatedbetween the front and rear members 21 and 22 of the jaw 18.

Passing through heads 14 and 15 and se curing them rigidly to the endsof the cylinder 11 are bolts 26 upon the ends of which may be mountedsuitable retaining means, such as nuts 27. The head 15 is provided withfour openings 28 to receive the bolts 26 and is provided on the outerface thereof with hollow. bosses 29 which surround the bolt openings,and within which are designed to be received buffers which relieve theretaining means, in the present instance the bolts, of

, the shocksinciden-t to the operation of the vibrator.

The bolts 26 are sufficiently long to extend through hollow bosses 29,as shown i'n'Fig. 5, and to project to a suitable extent from thesebosses. Mounted within each of the bosses 29 and surrounding thecorresponding bolt 26 is a buffer 30 in the form of a thick washer orthe like, provided with an opening 31 to receive the bolt. These buffers7 from the cylinders.

are preferably made of solid rubber and may be of suflicient thicknessto project slightly beyond the outer edge of the boss 29, as shownparticularly in Fig. 5 of the drawings. In diameter, the buffers willpreferably be of a proper size to fit snugly within the boss. A washer32 is positioned uponthe bolt against the outer face of the bufier, theedges of the washer being rounded so that it will not cut into thebuffer and a nut 27 being provided on the threaded end of the bolt 26.The opposite ends of bolts 26 pass through openings 33 in head 14 andmounted upon the adjacent ends of bolts 26 are washers 34 which arereceived in countersunk recesses 35 in head 14, washers 34 serving tosupport nuts 36 received upon the threaded ends of bolts 26 and incooperation with nuts 27 clamping the heads 14 and 15 to cylinder 11.

As shown in Fig. 1 of the drawings, when the vibrator has been placedupon the flask, it will assume a position wherein the parts of the jawwill be firmly lodged and bound against the parts of the flask by theweight of the vibrator which is held in a substantially horizontalposition extending outwardly from the wall of the flask so that theblows of the ram 13 may be readily transmitted to wall 19 of the flaskor other article upon which the vibrator is supported.

When the vibrator has been in use any considerable length of time thecontinued and oft repeated shocks delivered by the piston to the jawmember through the bolts 26 will cause the bolts in time to give way andthe heads to become detached or partly detached When this occurs, thework must be stopped until repairs can be made and this often results inexpensive and annoying delay. The nuts mounted upon-the bolts quiteoften become crystallized and may not be readily detached from thebolts, and in addition if but a' single bolt fractures it becomesnecessary inorder to withdraw this bolt to detach the other bolts inorder that the vibrator head may be removed. This is particularly truein vibrators of the present type in which the flask or other articleengag- 'ingparts of the jaw member are relatively wide, as shown indotted lines in Fig. 4, in order to give'a firm support to the vibratorwhen in operative position on the flask. It is desirable that the boltsbe mounted in the heads as closely as possible to the vibrator casing orcylinder and when so mounted it is impossible to withdraw any of thebolts or broken bolt parts in the direction of the jaw member, owing tothe fact that the bolts will strike the flask engaging parts of thismember,

for example, the flanges 20, 21, 22 and 23,

as will be readily understood from Figures 1 and 4 of the drawings.

One of the features of the present invention resides in a form ofvibrator in which fractured or broken bolts may be readily removedwithout dismounting the remaining bolts or detaching the heads from thevibrator casing. According to the invention, laterally extending opening37 are provided in head 14 extending into the bolt receiving openings 33in the latter. These openings are of a width at least equal to thediameter of the bolts 26. In case one of the bolts becomes fractured,the left-hand end of the bolt, as'viewed in Fig. 1, may be withdrawn asuflicient distance in opening 33, so that washer 34 is clear of thecountersunk opening 35, whereupon the bolt end may be withdrawn throughlaterally extending opening 37. The opposite end of the bolt may bewithdrawn through opening 28 and a new bolt inserted through the latteropening and through opening 33, the new bolt being threaded through awasher 35 and nut 36, the latter being tightened to secure the bolt inplace. Thus it will be seen that I have provided an arrangement inwhichthe broken bolt ends may be readily and quickly removed without thenecessity of removing the nuts therefrom, while the bolts are preventedfrom working out of place ifthey should become loosened owing to thewashers 34 which are received in the countersunk openings in thevibrator head. v

While I have shown and described a preferred embodiment of my invention,it will be understood that it is not to belimited to all the detailsshown, but is capable of modification and variation within the spirit ofthe invention and the scope of the appended claim. a

What I claim is 1 In a vibrator, a casing, a vibratory piston in saidcasing, heads one at each end of said casing, and bolts for securing theheads to said casing and to one another, one of said heads beingprovided with parts in ali n- I ment with and overlying the ends of thebo ts,

said heads being provided with apertures 1 through which the bolts passand in which the bolts are normally restricted to movement in an axialdirection, the head provided with the overlying parts being providedwith lateral slots extending into the bolt receiving openings throughwhich the adjacent ends of broken bolts may be withdrawn in a lateraldirection, the bolts being restricted to axial movement in the otherhead at'all times.

In witness whereof, I have hereunto set my hand this28th day of March,1929.

- GEORGE B. PICKOP.

